ok, so two nights ago i was playin the good old SK doin a roarmulus twins run (my favorite) when a problem occurred. the twins were up and invulnerable for 20 minutes before they finally started having semi-normal intervals. the problem escalated last night when the twins were invulnerable for 40 MINUTES! we fought and fought and fought but they just wouldnt stop being invincible and firing away at us. after the 40 gruelling minutes, they started going down at 5-6 minute intervals until we defeated them....i was happy that my group stayed together no quitting, we fought til we finally won and it was actually pretty epic! in the end the battle took 1 hour total, so i am hesitant to do anymore twins runs for a while. i hope this information will help you fix the problem!

sincerely,
Magnum-Frost